Dr. Althea
Jelly Seal Dewy Mask
A sheet mask from Dr. Althea's Korean-market lineup. Allantoin sits at position 9 of 23 on the brand's own ingredient list, a calming, comedolytic-adjacent skin-conditioning agent; Sodium Hyaluronate follows at position 14, a hyaluronic form working at the surface. 28g to a unit.
No reviews yet- Ships from our California warehouse
- Duties prepaid
- Suited to
- NormalDryCombination
- Helps with
- The final moisture step of a routineDaily use as the last layer of a routineA richer step for evenings or colder weather
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- Duties prepaid
- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
How it works
The Jelly Seal Dewy Mask is a 28g sheet mask, used after toner, in place of your serum step, in the evening. The active it is built around is Allantoin, named eighth on its own ingredient list. The same list carries Sodium DNA, Nelumbo Nucifera Leaf Extract and Arginine, so the active is not the only thing on it worth naming. How much of the Allantoin stays on the skin, and for how long, is decided by the sheet mask format rather than by the list alone. This is the Original Korean Formula, the sheet mask Dr.Althea sells in Korea, Allantoin and all.
Key benefits
- Allantoin, the active this sheet mask is built around
- Sodium DNA on the same list, an active
- Nelumbo Nucifera Leaf Extract on the same list, a plant extract
- Arginine on the same list, an amino acid
- Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid further down the same list
- Hyaluronic Acid and Potassium Hyaluronate further down the same list
Key actives
Allantoinactive
Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin. On this sheet mask's own ingredient list it is named eighth.
Sodium DNAactive
Sodium DNA is the salt of DNA, in Korean skincare almost always salmon derived, and it is the ingredient behind the PDRN category. It is used as a humectant and for the look of tired skin; the fragments themselves are what the name PDRN refers to. The panel names it twenty-first on this sheet mask's list, beside Allantoin.
Nelumbo Nucifera Leaf Extractplant extract
Nelumbo Nucifera is the sacred lotus. Its leaf extract carries flavonoids and is used as a conditioning antioxidant extract. The panel names it twentieth on this sheet mask's list, beside Allantoin.
Arginineamino acid
Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster. The panel names it seventh on this sheet mask's list, beside Allantoin.
Polyglycerin-3humectant
Polyglycerin-3 is a short chain of glycerin units used as a gentler, less sticky humectant. It also helps oils and water stay blended. The panel names it fifth on this sheet mask's list, beside Allantoin.
Dr. Althea Jelly Seal Dewy Mask
Where does this sheet mask go in my routine?
After toner, in place of your serum step, in the evening. Toner goes on before it, and the rest of the routine goes on after you take the sheet mask off. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Allantoin and not three changes at once.
Is this the Korean-market sheet mask or a US version?
The Korean-market one, Allantoin and all. We match this sheet mask to its Korean barcode before it reaches the shelf, which is the check that tells you which market release you are holding.
What else is on the list besides Allantoin?
Sodium DNA, Nelumbo Nucifera Leaf Extract and Arginine. The order they are printed in on this sheet mask's panel is the order on the box, so you can see where Allantoin sits relative to them. Further down the same panel: Polyglycerin-3, Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
Payment and security
We accept
How to use
- Use the Jelly Seal Dewy Mask after toner, in place of your serum step, in the evening.
- Unfold the sheet, line it up at the eyes first, then smooth it outward so no air is trapped underneath.
- Take it off at the time printed on the pack, pat in the essence left behind rather than rinsing, then go straight to your moisturizer.
- Two or three evenings a week is a normal rhythm. Do not leave it on past its time; a sheet that has gone dry takes moisture back off the face as it goes.
Worth knowing
- Patch test on the inner arm first, as with any new step added to a routine.
- Discontinue if irritation develops and check the ingredient list against any known sensitivity.
Reviews
No reviews yet. Tell us how much you love the product!
Write Reviews (opens in a new tab)We’re on gram!
Creators trying on authentic Korean skincare routines and products from us.
Rating a shelf of Dr. Althea products one by one.
Jasmine Loo · YouTube
Two hydrating serums side by side, IUNIK and Dr. Althea.
Kristin · YouTube
A walk through the Dr. Althea serum lineup and who each one suits.
auraofmahmuda · YouTube
A blunt first take on the Dr. Althea range.
Lexi Chang · YouTube
A first look at the viral 345 Relief Cream before buying.
Shelley Nayak · YouTube
A first try of the Dr. Althea serum on camera.
Hannah Ziad · YouTube
Dr. Althea, Korean-market original
The Original Korean Formula sheet mask from Dr.Althea, 28g formulated with Allantoin and Sodium DNA, held in the United States and shipped domestically.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
Match the batch code on the box against the code printed on the bottle or tube itself; the two are stamped separately and should agree.
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.
Allantoin can tone down the dryness of the individual cells. It increases the water content of the skin, which means it helps to hydrate and moisturize.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic It's still a very new ingredient in the field of regenerative medicine.
Catherine ChangBeverly Hills board-certified plastic and reconstructive surgeon, Harper's Bazaar
Ask an AI assistant about this product
Ask an AI assistant about this product
Opens ChatGPT, Perplexity or Claude in a new tab with the question prefilled. Claude asks you to sign in first.